Machine for punching and shearing metal



(No Model.)

J. L. LEWIS.

MACHINE FOR PUNGHING AND SHEARING METAL.

No. 262,600. Patented Aug. 15, 1882.

PETERS. PhotoLlHmgrapher. wan-mm. n. c.

U ITED STATES P TENT Prion.

JOHN L. LEWIS, OF PITTSBURG, PENNSYLVANIA.

MACHINE FOR PUNCHING'AND SHEARING METAL.

SPECIFICATION formingpart of Letters Patent No. 262,600, dated August 15, Application filed February 21, 1882. (No model.) 7

To all whom it may concern Be it known that I, J OHN L. LEwrs, of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Combined Vertical Punch and Lever-Shear; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same, reference beinghad to theaccompanyingdrawings,which form a part of this specification, in which Figures 1 and 2 are respectively front and rear elevations of my invention. Fig. 3 is a transverse section on line as w .of Fig. l.

The object of this invention is to so construct an ordinary vertical punching-machine as to renderitcapahle of doing duty as a barshear while fulfilling its purpose as a punching-machine.

The invention is especially adapted to that class of punching-machines in which a pinion on the driving-shaft gives motion, through a large spur-wheel, to a horizontal shaft passing through the body of the machine, and by the rotation of an eccentric on the said shaft a punch is slowly reciprocated vertically. Such a machine is illustrated in the drawings, where A is the driving-shaft, rotating a small pinion, B, which in turn imparts a slow rotary motion to the large spur-wheel G, mounted on horizontal shaft D, which passes through the upper part of the body E, and by means of an eccentric on its other end gives a verticallyreciprocating movement to a punch, F, which works in slides in the head G of the machine. Under thehead G is the die-block H, resting on the anvil I, which is integral with the body E.

W'ith more or less modification, the foregoingillustrates in a general way the whole class of vertical punching-machines in ordinary use, in which the shafts A D are employed, and to which class this improvement relates.

My invention consists in constructing such a punching-machine with a lever-shear arranged transversely in the body of the punching-machine, so as to move in a plane perpendicular to the axis of the eccentric shafts; further, in locating said lever-shear so that its jaw will be at one side and its tail at the opposite side of the body of the punching-machine;

and, finally, in the construction and combination of parts, all substantially as hereinafter described and claimed.

I form the body E with the transverse opening J, and cast or bolt thereon the two bearings a a, in which is journaled the continuation or extension K of the driving-shaft A. Extension K is formed with the crank b, which works in the brasses c c, which slide in the space or slot between the forks dd of the shearlever L, said forks being re-enforced by the tiebolt 0, as shown. Lever L passes through opening J to the other side of the body E, where it is journaled in bearings ff by the bolt g, as shown. It has the upper jaw, 71, which carries a knife, i. The lower knife, 2', is attached to the lower jaw, j, which projects from the body E a suitable distance for that purpose. While the punch F is reciprocating slowly the crank b of shaft A is imparting a rapid but powerful vibratory movement to the lever L, and thus the shear is rapidly operated.

Extension K may be coupled to shaft A by an adjustable coupling or clutch, so that it may be thrown out of use at any time.

It is obvious that a pitman may be used instead of the direct-acting crank b.

I am aware that hand punching-machines have been made with a lever-shear at one side; but such are not applicable to power-presses, for the reason that the latter require momentum and are designed for heavy work, of which a hand-press is incapable. To power-presses alone operated by a rotating shaft my present invention relates.

I am also aware that broadly a compound power-press operating a punch and a shear is not new; but in my knowledge all such, as well as com pound hand-presses, have the shear propelled directly from the same source, and the punch is operated by the shear-lever, or vice versa, and both are so located that they can be used only one at a time, except for such purposes as require a punch and cut to be given simultaneously. My invention is entirely different from these. I aim to secure the slow reciprocating movement necessary in a vertical punch, and at the'same time provide a quick and powerful action for the levershear, and I locate the latter and arrange it so that it can be used simultaneously with the punch without any interference therewith. These objects I effect by arranging the shearlever transversely, as described, and operating it from the rapidly-rotating main shaft. The results reached can be obtained in none but a transverse arrangement of the levershear, so that its movement will be in a plane perpendicular to the axis of the eccentric or punching shaft.

I claim as my invention- 1. In a vertical power punching-machine havinga main driving-shaft operating a punching or eccentric shaft and revolvingat a higher speed than said eccentric shaft, the combination, with such punching-machine and main driving-shaft, of a lever-shear arranged to vibrate in a plane perpendicular to the axis of said eccentric shaft and operated directly by said driving-shaft, substantially as described, whereby the punch may be slowly operated in the usual manner, and the shear may be rapidly operated independently but simultaneously therewith.

2. In a vertical power punching-machine having a main drivin g-shaft operating a punchin g or eccentric shaft and revolving ata higher speed than said eccentric shaft, the combination, with said punching-machine and such main driving-shaft, of a lever-shear arranged transversely in the body of the punching-machine, having its cutting-jaw at one side and its tail at the other side of the body of the punching-machine, and an intermediate fulcrum, substantially as described, whereby an extended lever may be used and sufiicient power and momentum developed for heavy work.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in presence of two witnesses.

JOHN L, LEWIS.

Witnesses:

THOMAS J. PATTERSON, T. J. MCTIGHE. 

